Holder for wire-drawing dies



Feb. 21, 1939.

HOLDER FOR WIRE Filed March F. W. GAINES. 3D

DRAWING 'DIES 2 Sheets-Sheet 1 ATT RNEYS Feb. 281, 1939. F. w. GAINES. 3D 2,147,888

HOLDER FOR WIRE DRAWING DIES INVENTOR.

FREDERIC K W 6x4/N56 ko ATTO 'Patented' Feb. 21, 1939 g PATENT /OFFICE 2,141,888 nomma Foa wma-mismo oms Frederick W. Gaines, 3d, Cleveland Heights, (lhlo, assignorto The Ajax. Manufacturing Company, Euclid, Ohio, a corporation of ,Ohio

Application March 23, 1937, Serial No. 132,535

4 Claims. (Cl. 205-25) This invention has to do with the dies of wiredrawing machines and as its principal object aims to provide novel die supporting means in which a supply of lubricating compound is retained ad 5 jacent the die and in which dies oi dinerent sizes can be readily substituted.

Another object of my invention is to provide improved mounting means for a wire drawing die in which the mount has a recess for drawing compound and a quick-detachable cover aifording access to the recess for cleaning or replacing the die. A further object of my invention is to provide an improved support for a wire drawing die in which the die is permitted to rotate or float during the drawing operation.

' My invention may be further briefly summarized as consisting in certain novel combinations and arrangements of parts hereinafter described and particularly set out in the appended claims.

This application is in part a continuation of my original application, Serial No. 80,973, illed May 21, 1936.

In the accompanying sheets of drawings- Fig. 1 is a partial cross section of a wire drawing machine showing. in end elevation, a die mount embodying my invention,

Fig. 2 is a longitudinal sectional view taken through the mount as indicated by line 2--2 of so Fis. 1.

Fig. 3 is a partial longitudinal sectional view similar to that of Fig. 2 but showing a die of diiferent form,

Fig. 4 is a longitudinal sectional view taken '35 through another die mount embodying my invention and in which the die is permitted to float or rotate,

Fig, 5 is a transverse sectional view taken through the mount as indicated by line 5-5 of Fig. 4,

40 Fig. 6 is a plan view showing another die mount embodying my invention,

Fig. 'l is an end view thereof, and

Fig. 8 is a transverse sectional view taken 45 through the mount as indicated by line 8-8 of Fig. 7.

In the accompanying drawings to which more detailed reference will presently be made, I have shown improved mounts for wire drawing dies 50 or the like, and although these mounts are hereinafter referred to as forming a part oi a reciprocating wire drawing machine, it should be understood that the invention may be embodied in various other machines and constructions.

55 In Figs. 1 and 2 of the drawings I show a body III which provides a mount for a wire drawing die II and which has a recess or pocket I2 extending thereinto and forming a container for retaining a supply of lubricant or metal working compound in front of the die. Such compound 5 may be in the form of a lubricating powder or may be any other appropriate substance. The body I0 may be formed of cast metal or any other suitable material and is here shown in the form of a slide having lateral projections I3 which lo slidably engage in guideways provided on the frame I4 of a wire drawing machine. The slide is adapted to be reciprocated in the guideways of the frame for alternately forcing the die I I over a section of the wire or stock I5 while the latter is 15 being held and returning the die to its starting position while the stock is being advanced in the direction indicated by the arrow. The slide may be moved toward the left as seen in Fig. 2 for a working stroke by levers or arms I6 having rock- 20 ing engagement with the slide, and is adapted to be returned by movement toward the right by the action of compression springs Il.

The mount or slide Ill is formed with a hollow seat or recess I8 therein in which the die II is 25 adapted to be inserted and retained by the set screw I9. 'I'he pocket or recess I2 of the slide is preferably formed to extend intothe slide from the top thereof with an extension of the recess extending down in front of the die II. At opposite sides of the die-receiving recess I8 the slide Ill is provided with openings 2l and 22 which are substantially coaxial with the orifice 23 of the die. The opening 2l communicates with the pocket I2 of the slide and is adapted to be closed by a 35 movable cover 2l engaging therein. The opening 22 may be a relatively elongated opening which communicates with the die-receiving recess It and in which an elongated guide bushing 25 may be disposed and retained by a set screw 26.

'I'he opening 2l is preferably located with the lower edge thereof below or substantially flush with the bottom wall 21 of the compound container so that when the cover 24 has been removed the compound which remains in the pocket of the slide can be readily discharged through this opening. The opening 2| is also formed of a size such that the die II, or any other die of different size which is to be substituted therefor, can I be readily inserted or removed through thisr opening.

As shown in Fig. 2 the cover 24 is provided .with a central opening 28 which is aligned substantially with the orifice of the die when the cover is in place. A bushing 29 engages in the u opening of the cover and serves as a guide for the wire or stock i5 and also to prevent loss of compound through the cover opening. This bushing is readily removable from the cover opening and is adapted to be replaced by a bushing of diiierent size to correspond with the diameter of the stock and the size of the drawing die desired to be used.

To provide for quick removal and replacement f of the cover 24 I employ a quick detachable retaining member or locking bar 3| which extends across the cover and has releasable connection with the slide i0. In this instance the retaining member 3| has oppositely extending slotted arms 32 which engage studs I3 of the slide in the manner ot a bayonet-type lock. The retaining member Il preferably bears against the bushing 29 and may have an opening into which the outer end of this bushing extends. In arranging the retaining member to bear against the bushing 29 it will be seen that this member can be utilized to hold the bushing in place in the cover as well as to hold the cover in place in the opening 2|.

If desired the opening formed into the top of the slide can be closed by a suitable cover 35 to thereby prevent the accidental loss of compound. The cover may be conveniently retained in place on the slide by means of a bail-type latch 36.

With the die arrangement and mount as just described it will be seen that a supply of compound placed in the recess i2 of the slide will be retained in front of the die and will contact the wire before it enters the die orifice, and that as the compound is used. up the reserve supply will automatically travel downwardly tov a' position in front of the die. It will also be seen that by releasing the quick detachable bayonet-type retaining member 3|, the cover 24 can be withdrawn from the opening 2| to thereby permit the ejection of used compound and the cleaning or replacement of the drawing die Il.

Although a die of any suitable form may be used in the mount, I show the die l I as having an orifice or passage which increases in size from the throat of the die toward the exit side I1 thereof. I also show the bushing 25 as having a passage 38, which, at the inner end of the bushing, has a bell mouth or tapering enlargement 30 decreasing in size in the direction in which the stock travels. When a new section of stock is started through the die, its leading end tendsto curl on emerging from the die orifice, but by providing the inner end of the bushing 25 with the bell mouth 439, the stock is readily guided into the passagef of this bushing.

Instead of having the drawing orifice formed directly in the die I. it maybe formed in a bushing or insert 4l which fis', in turn, seated in an opening of a die 4| .asfshown in Fig. 3 of the drawings. 'Ihis construction may be desirable for purposes of economy, as where an expensive alloy is to be employed or where provision is to be made for renewal of the part of the die which is subjected to wear.

In Figs. 4 and 5 of the drawings I have shown another die mount which is generally similar to the mount of Figs. 1 and 2 but in which the drawing die 4l is permitted to iioat or rotate during the drawing operation. 'I'he mount 45 may also be in the form of a slide adapted for reciprocating movement and has a pocket or recess 41 extending thereinto from the top and forming a container for drawing compound. The mount is provided with an arcuate seat or recess 48 in which the die 46 engages and is retained by a cap 4l. Tins cap is formed with an arcuate recess 50 which is compltmental to the recess 48 of the slide. A pair of shoulders 5| provided on the slide prevent lateral displacement of the cap and a second pair of shoulders 52 prevent the cap from gripping the die when the cap is clamped in place as by means of a clamping member 53 and the stud 54. Axial shifting of the die in one direction may be prevented by ribs 55 formed on the slide and in the opposite direction by the exit face of the die engaging the wall of the slide. In permitting the die to rotate or iioat in the recess of the mount it will be seen that the die will be self-adjusting or self-aligning during the drawing operation.

The mount 45 is also provided with bushings 51 and 58 generally similar to the bushings 25 and 28 of Fig. 2, and with a quick detach-able cover 59 in which the bushing 58 is mounted.

In Figs. 6, 7, and 8 I show another die mount A60 which is generally similar to the two mounts I0 and 45 already described but which is preferably in the form of a box adapted to be secured to a stationary frame member 60a as by means of bolts extending through the holes 60h. The mount 60 has a recess or pocket 6| extending thereinto from the top and which provides a container for retaining a supply of compound in front of the drawing die 62. A die receiving recess 63 is formed in the mount and is adapted to have the drawing die 62 retained therein by the set screw 64. An opening 65 formed in the mount substantially opposite the die 62, and communieating with the pocket 6|, is adapted to be closed by a quick-removable cover 66. Bushings 61 and 68, carried respectively by the cover 66 and the slide 60, align substantially with the orifice of the die. The bushing 68 may be relatively short as compared with the bushings 25 and 51 of Figs. 2 and 4, and if desired may be of substantially the same length or only slightly longer than the bush'- ing61. During use of a die and mount of the type illustrated in this instance the stock is pushed or pulled through the orifice of the die 62 and the thrust of the drawing operation is taken by the stationary frame member 60a. v

While I have illustrated and described my improved die mount in a somewhat detailed manner, it should be understood that I do not wish to be limited to the precise details and arrangements herein disclosed but regard my invention as including such changes and modifications as do not constitute a departure from the spirit and scope of the appended claims.

Having thus described my invention, I claim:

1. In apparatus of the character described a body having a chamber extending thereinto from the top thereof and substantially aligned openings communicating with the chamber and 'extending through opposite walls thereof, means for mounting a die in the chamber adjacent the opening of one wall of the body, and a cover for the opening of the other wall, said cover having an opening for the passage of stock to the die and being slidable along the stock away from said body to permit cleaning of said die and chamber through the opening of said body.

2. In apparatus of the character described a /body having a chamber extending thereinto from the top thereof and substantially aligned openings communicating with the chamber and extending through opposite walls thereof, a die, means for mounting said die in the chamber adjacent the opening of one wall of the body, the opening of the other wall being of a size to permit passage of `said die therethrough, and a `removable cover for the latter opening.

3. In apparatus of the character described the combination of a wire-drawing die, a support for the die having a recess extending therento for retaining compound in front of the die and an opening at the side thereof of a size to permit insertion or removal of the die, a cover for said opening and itself having an opening which aligns substantially with the orifice of the die when the cover is in place, a bushing reieasabiy engaging in the cover opening, and retaining means having detachable connection with said support and adapted to releasably hold said cover in place and to retain said bushing in the cover opening.

4. In apparatus of the character described, a die mount comprising a body having a chamber extending thereinto from the top thereof and substantially aligned openings communicating with the chamber adjacent the bottom thereof and extending Athrough opposite side walls, an arcuate seat on said body adjacent the opening of one of said walls and spaced from the other wall, projections formed integral with said body and extending into the chamber thereof so as to form a pair of opposed die retaining shoulders spaced from said one wall, a cap complemental to said arcuate seat and extending part way into the space'between said opposed shoulders and said one wall, and a die retained in said seat and cap and having limited oating therein, said chamber providing a pocket for retaining metal-working compound adjacent the die.

FREDERICK W. GAINES, 3RD. 

